Bias-cutting machine



March 15,1927.

J. W BRUNDAGE BIAs CUTTING MACHINE 2 Sheets-Sheet l Filed -May 22, 1925 March l5 1927.

Filed May 22. 192.5

J. W. BRUNDAGE BIAS CUTTING MACHINE Sme/ratez James WB/wzndaj Patented Mar. 15, 1927.

JAMES w. BRUNDAGE, or Annen, eine,

Flea.;

ASSIGNOR TO THE MILLER' RUBBER COM- \PANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

Bras-CUTTING MACHINE.

My present invention relates to improve ments in machines for cutting continuously travelling sheets of fabric or the lilre into bias cut strips, and is Adesigned as an improvement upon the machine which forms the subject of an application tiled by V. V. Messer on the 28th day of February, 1924, Serial No. 695,727.

rThe invention aims to provide a machine which will take its supply from a supply roll and will wind the cut strips with an interposed liner into roli form convenient for subsequent use.

The invention further aims toV provide.

means whereby the fabric will be smoothly delivered to the platenroll and prevented from slipping thereon. Y

Another object is to provide means whereby any slippage of the fabric on the drum will be avoided.

In connection with the feature of winding the eut strips on a fabric liner, I have aimed to provide a construction such that the strips will be applied to the liner with their edges in spaced relation.

I have further aimed to provide apparatus of the character described in which sprocket wheels and chains of the standard type embodying removable and interchangeable links may be used, the cutter carriers being designed to be detachably connected to any of said links and the cutters to be individuallyadjustable lengthwise of the chain. i

With these and other objects in view, which will hereinafter appear,- the invention comprises the novel features of construction and arrangement, and combination of part-s j hereinafter described and particularly defined by the appended claims.

A n embodiment of my invention is shown in the accompanying drawings, in which Figure 1 is a side elevation of the machine, and i Figs. 2 to 5 respectively, are detail views showing the improved form of cutter carrier- Fig. 2 being a side elevation of one of these with a portion of the carrying chain.

Fig. 3 an end view, Fig. 4 a 'plan View, and Fig. 5 a section on line 5 5 of Fig. 4. l Referring by the reference characters` to this drawing, the numeral l designates a platen roll formed preferably of hardened steel having a smooth and polished periphery around Whichthe rubber coated fabric 1s passed, and bywhich it is cut by an end-` find that in actual commercial practice it is desirable to supply the rubber coated fabric to the drum in roll form, thek fabric being wound up in a roll with an interposed'liner. VSuch rollis indicated at A,the fabric beingk indicated at A and the liner at BC The roll A is carried by what may be termed a spool shaft a supported in brackets 2 fromk the main frame of the machine, yand move-l ment of the drum in unwinding is restricted or retarded by friction means preferably in the form of a band brake 3. As the fabric is unwound from the drum, the liner is wound Onto a liner talre-up roll B onasuitable spool shaft b journalled in braekets,

which spool shaft maybe driven in any suit-V roll, which interferes with the-accurate cutting of the fabric. To this end I leadk the fabric from the supply roll overa spreader roll 30 which is arranged with helical cor'y rugations extending inl opposite directions from the center of the roll toward .the ends thereof. From the spreader roll 30 the `fabric passes to a puller roll 31 which is located preferably to the left of a vertical plane, Fig. l, passing through the axis of shaft 8 of the platen roll, the fabric being led back around ,the platen roll, which causes it to hug the platen roll for-,not less than one-v half thel circumference thereof, and this large area of contact prevents any tendency of slippage of the fabric on the platen roll.

I find that thebest results are secured by driving the puller roll at a speed about three per cent slow-er than the platen roll l, whereby the fabric is laid on the platenl roll under tension, and driving the spreader roll 80 slightlyfaster than the puller roll, thel Y page `on thek fabric and serving to spread it i quently so sticky or tacky that it tends toV opposite faces of the fabric.

. arrangement for this purpose is to provide laterally'and smooth it out before it reaches the puller roll. The driving connections for the rolls k3 0 and 31 may be of any desired type, and are shown conventionally'in the drawings.

I .find that rubber coated fabric .is frestick to the puller and platen rolls, and to avoid this I provide means for brushing the A convenient a pair Vof arms 53 articulated on the shaft of the spreader roll at each end thereof, which are provided with means tending to rock them in theVV direction of the arrow, Fig. 1,

such for example as weight 54. Articulated on the opposite ends of the levers 53, at 52,

are brush carrying levers 5G which havev voffset arms lying .iiiA planes respectively on opposite sides ofthe plane of the fabric sheet, as indicated at 50, which arms arev connected respectively by oppositely faced brushes 51 which impinge against opposite faces of the sheet. Springs 55 connected to levers 50 resist the upward'motion of the lowermost arms 50Et and hence tend to rock the lever arms 50 about aXis 52vto press the vbrushes with sufiicient force against the oposite faces of the sheet. Y Y

' YShaft Bof the platen roll carries fast ythereonV a sprocket 9 which is preferably driven by a sprocket chain 10 passing around sprocket wheels 11, 12, 13 and 14, respectively, The shaft of Vsprocket wheel 12 may conveniently be used'as a source of power for driving the belt v6 through the sprocket connections shown'. Sprocket wheel 13 is preferably used for connection to the prime jmover which may be effected by suitable Y' meshes with a gear 28 on the shaft 28 which carries one of the sprocket wheels 28b locatedat one end ofthe roll, a similar idle sprocket Vbeing provided at the opposite end.

c An idle presser roll 32 is arranged to Vbear against the under surface of the platen roll in close proximity to the platen, to clamp the fabric thereto close to the cutting point, the `idle roll'being mounted on ak swinging` frame 33 having anarm extension 34 which is pressed under the tensionrof a spring 35,

wards the platen roll. l Y

I find that in order to expeditiously hanc le which tends to hold' the roll `32V pressed tothe cut strips, these should be wound up` ony a liner `with their edges in spaced relation. To this end I provide means for supporting a liner roll C which may comprise brackets 37 carried by the main frame for removably supporting the roller spool shaft, means being provided for regulating the unwinding action of the liner, indicated at C', which regulating means may consist of a friction brake 38.V After leaving the liner roll, the liner passes around a roll 36 located adjacent the cutting point but on the Yopposite side of the cutters from roll 32, such roll 36 being journale'd in al swing frame 36a having an arm or arms 36b which are pressed under the tension of a spring 36c whereby the roll 36 is platen roll. c Y

Roll 36 is preferably driven by vsprocket gearing, as shown, from shaft 14, which in turn is driven by the sprocket chain in the manner hereinbefore described. The swing frame 36n is mounted to pivot about the shaft l14, the'liner travelling around roll 36 and being pressed thereby against the tacky sur face of the cut sheets, picks or strips these off from the surface of the platen roll 1 and conveys the said cut sheets to the wind-up roll indicated at D, which is formed as a floating spool supported in the guides 40a of a bracket 40 carried by the main frame. This take up roll D contacts withdrve roll 41 driven by chain andsprocket connections 42, 43, 44, 45 and 46, from the shaft of puller roll 31.` The roll 36 Vis driven somewhat pressed yieldingly towards the .Y

Cil

faster (say three percent) than is the platen roll 1, and consequently the cut sections of the fabric aredeposited on theV liner in spaced relation.

In order to use for the cutters, chain and sprockets of standard construction, I provide the cutter carrying inechanismshown vin detail in Figs. -2 to 5 inclusive. 'In this,

designates the chain links which are detachably connected .in the customary manner by pins 60a. Associated with each cutter and supporting the same is a carrier block or plate-like member 61 which has depend ing lugs'61a which are adapted to embrace the outer faces of the links and have openings therein through which the pivot pins of the chain links may pass, it being only necessary to provide slightly longer pinsv at the points where the carrier blocks 61 are to be connected. Each carrier block is provided with spaced parallel side fianges 61b between which fit thev cutter carriers 62 which have lateralV iianges 62aL provided with" elongated slots 62" through which pass the securing. screws 6.3. By loosening these screws each cutter carrier 62 may be adw justed lengthwise of the chain within the llO limits defined by the slots, whereby extreme accuracy ofV adjustment is possible. Iffa greater lrange of adjustment is necessary,

- infinies' this may be effected by-connecting the block 61 with the different pivots of the links, and it is, of course, obvious that links may be removed or added at will where it is necessary tolengthen or shorten the chain. As the form'of cutter and manner of mounting it in the cutter carriers 62, is substantially the saine as disclosed in the application above referred to, specific description there of is deemed unnecessary.

Having thus described my invention, what l. Iii a machine of the class described, the combination with a. rotatable platen roll and a plurality of equally spaced apart connected cutters movable longitudinally of the roll and adapted to impinge` thereagainst, 0f means for feeding the fabric to the roll including means for applying tension tothe fabric. l

2. In a machine of the class described,the combination with a rotatable platen roll and a plurality of equally spacedV apart con-V nected cutters movable longitudinally of the roll and adapted to Aimpinge thereagainst, of means for feeding the fabric to the roll, in-

cluding means for applying tension to the fabric, and means interposed between said feeding means and platen roll for spreading the fabric laterally.

3. In a machine of the class described, the combination with a rotatable platen roll and a plurality of spaced cutters movable longitudinally of the roll and adapted to impinge thereagainst, of means for feeding the fabric to the roll, including means for applying tension to the fabric, and means interposed between the. feeding means and platen roll for brushing the opposite faces of the fabric..

l. In a machine of theclass described, the combination with a rotatable pla-ten roll and a plurality of spaced cutters movable longitudinally of the roll and adapted to impinge thereagainst, of a guide roll located on the opposite side of the platen roll around which the fabric is led prior to contact with said platen roll, whereby said fabric contacts with not less than one-half of the peripheral surface of the roll before reaching said cutters. Y

5. In a machine of the character described, the combination with a rotatable platen roll and a plurality of spaced cutters movable longitudinally of the roll and coacting therewith, with means for rotating said roll and moving said cutters at determined rates of speed, of a friction retarded supply roll, a puller roll adjacent the platen, around which the fabric passes, and means for driving said puller roll at a slower speed of rotation than that of the platen roll.

6. In a machine of Vthe character described, the combination with a rotatable platen roll and a plurality of spaced cutters movable longitudinally of the roll and co4 acting therewith, with ineansjfor rotating said roll and moving said cutters at deteraround which the fabric passes, means for driving said puller roll at a slower. speedgof rotation than that of the platenk roll, land a spreader' roll interposed between said puller roll and supply roll and impinging against one face ofthe fabric. Y Y j 7. In a machine of the class described, the combination with a'rotatable platen roll and a pluralityy of spaced cutters movable longitudinally of the roll and adapted to impingethereagainst, of means for feeding the fabric to the roll, including meansfor applying tension to the fabric, and means interposed between the feeding means and platen roll `foi-brushing the opposite faces of the fabric, comprising a pair of oppositely extending arms located adjacent'the opposite edges of theV fabric, brushes carried by said arms andoverlying opposite faces of the fabric, said arms being fulcrumed intermediate the brushes, and yield-able means tending to rotate said arms to press the brushes against the fabric.

8. In a machine of the character de-` scribed, the 'combination with a rotatableY platen roll and a plurality of spaced cutters movable longitudinally of the roll and coacting therewith, with means for rotating said roll and moving said cutters at determined rates of speed, of roll supply means for feeding uncut fabricrto said platen roll, and means for securing the cut strips and winding them in roll form withk an interposed liner. c

9. In a machine of the character de-v scribed, the combination with a rotatable platen roll and a yplurality of spaced cutters i movable longitudinally of the roll and coacting therewith, with means for rotating said roll and moving said cutters at determined rates of speed, and means for feeding fabric to said platen roll, of means for feeding a liner strip into Contact with the cut strips in close proximity to the cutters, and means for winding up said liner with the cut strips in roll form.

lO. In a machine Vof the character described, the combination with a rotatable platen roll and a plurality of spaced cutters movable longitudinally of the roll and coacting therewith, with means for rotating said roll and moving said cutters at determined rates of speed, and means for feeding fabric to said platen-roll, of means for feeding a liner strip into contact with the cut strips in close proximity to the cutters, and means for winding up said liner with the cut'strips in roll form, said liner feeding means including means whereby the liner is fed slightly faster than the surface speed of theV platen roll, whereby the strips are apllO l I plied to the liner Withtheir edges in spaced l relation. i

11. In a machine of the class` described,

Vthe combination with a platen druinand '1 with the druiii.

i l2. In a machine lor the class described, the 1 combination with a platen drum and means for rotating it, of sprocket Wheels at opposite ends oi' said drum, a sprocket lcliain passing around said sprocket Wheels, and

composed of pin connected links, guide blocks having earsY adapted for connection to said link pins, guides cooperating` With -1 said blocks, and cutter `carriers adjustably connected to said guide blocks.

13,-In armachine of the class described, the combination, with a continuously driven platen roll, and an endless chain of cutters arranged to impinge tliereagainst longitudinally of the roll, of a .frictionally Vretarded supply roll, of a spreader roll to which the fabric is led from the drum, aV puller roll over which the fabric is passed .after leaving the :spreader roll and whence it passes to the platen roll, and means for'driving said pullery roll at 'av slower speed than the lplaten roll. i Y lekIn a machine of the class described, the combination, with a continuously driven platen roll, and an endless chain of cutters arranged to impingecthereagainst longitudinaily oi" the roll, of a rictionally retarded supply roll, of a spreader roll to which the fabric is led from the drum, a puller roll over Whichthe fabric is `passed after leaving the spreaderroll and WlienceY it passes to the 'i platen roll, Yand means forV driving saidl puller roll at a slower speed than the platen roll, and means for driving the spread-er roll at a faster speed than the puller roll.

' In testiinonywhereof I atlix my signature..

JAMES vv BRUNDAGE. 

